Belopolsky Aristarkh Apollonovich 
(01 (13) .07.1854–16.05.1934)

An outstanding Russian astronomer, academician. 
Born in Moscow in the family of the warden of the 2nd Moscow Gymnasium, later the controller of the Moscow-Yaroslavl Railway. His father was the most cultured man of the time, and his patron and connoisseur of art, S.I. Mamontov, the great Russian artist I.E. Repin and other famous people. Such a beautiful environment favorably influenced the upbringing of the boy: all his life he loved literature, art, especially music.
Since childhood, Belopolsky manifested craving and ability for technical design and invention, which largely determined his entire future life. He graduated from the 2nd Moscow Gymnasium and entered the Physics and Mathematics Faculty of Moscow University, intending to become an engineer. But fate decreed otherwise. At one of the lectures on astronomy, Professor F.A. Bredikhin appealed to students to help him in the technical re-equipment of some devices. Called Belopolsky, who was fascinated by this work and became an unofficial technical assistant to Bredikhin. Gradually, a mathematics student who was about to become a mechanic turned into an astronomer scientist. At the end of the university, at the insistence of Bredikhin, the young man was left at the university. Soon Belopolsky became an assistant at the Moscow Astronomical Observatory, where, under the leadership of Bredikhin, he took up systematic photography of the Sun. The results of this work, he laid the foundation for his master's thesis "Spots on the Sun and their Movement", defended in 1887. 
In 1888, Belopolsky went to work at the Pulkovo Observatory, the director of which soon became Bredikhin, who appointed Belopolsky to the post of astrophysics. In 1900, he became an adjunct of the St. Petersburg Academy of Sciences, in 1903 an academician, in 1908–1916 he held the posts of vice director, and in 1916–1919 - director of the Pulkovo Observatory. Since 1933, he is its honorary director. 
Scientific work Belopolsky relate to many areas of astronomy. He determined the parallax of stars, made studies of the rotation of Jupiter and revealed various periods of its rotation at the equator and in higher latitudes. Based on observations obtained at Pulkovo in 1881–1888, he conducted studies of the rotation of the Sun in the motion of torches. Belopolsky is one of the founders of modern astrophysics, he has a great merit in the application of astrophysical methods to the study of stars. One of the first he received photographs of the spectra of heavenly bodies using spectrographs (designed one of the spectrographs). Studies of the radial velocities of stars, in particular variable cepheid stars, based on the Doppler principle, carried out since 1890, were of outstanding importance. Belopolsky did a lot in the study of comets. 
Office work Belopolsky combined with expeditionary. In 1887, he participated in an expedition to Yuryevets to observe a total solar eclipse, was a member of astronomical expeditions to the Far East and Central Asia, and shortly before his death, he traveled to the North Caucasus to select an astrophysical observatory building site. 
He died in Leningrad, buried in the cemetery of the Pulkovo Observatory. 
Glacier on the island of West Svalbard. 
Called by “degree measurement” expedition.


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